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Finding the Fourth Proportional to 7,690.70, 10,611.88 and 4,286.97

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Solution

The fourth proportional to 7,690.70, 10,611.88 and 4,286.97 is: 5,915.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,690.70 : 10,611.88 = 4,286.97 : x
  2. Step 2: Convert to fraction form
    7,690.70/10,611.88 = 4,286.97/x
  3. Step 3: Cross multiply
    7,690.70x = 10,611.88 × 4,286.97
  4. Step 4: Simplify right side
    7,690.70x = 45,492,800.49
  5. Step 5: Solve for x
    x = 45,492,800.49/7,690.70
  6. Step 6: Final answer
    x = 5,915.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.